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       dlg - DFA Lexical Analyzer Generator


       dlg [options] lexical_spec [output_file]


       dlg  is  a  tool  that  produces fast deterministic finite automata for
       recognizing regular expressions in input.


       -CC    Generate C++ output.  The output_file is not specified  in  this

       -C[ level]
              Where  level  is  the  compression level used.  0 indications no
              compression, 1 removes all unused characters from the transition
              from  table,  and  2  maps  equivalent  characters into the same
              character classes.  It is suggested  that  level  -C2  is  used,
              since  it will significantly reduce the size of the dfa produced
              for lexical analyzer.

       -m     Produces the header file for the lexical mode with a name  other
              than the default name of "mode.h".

       -i     An  interactive,  or  as  interactive  as  possible,  parser  is
              produced.  A character is only obtained when required to  decide
              which  state to go to.  Some care must be taken to obtain accept
              states that do not require look ahead at the next  character  to
              determine  if  that  is  the stop state.  Any regular expression
              with a Kleene closure  at  the  end  is  guaranteed  to  require
              another character of look ahead.

       -cl class
              Specify  a  class  name  for  DLG  to  generate.  The default is
              DLGLexer.  "class" will be a subclass of DLGLexerBase; only used
              for -CC.

       -ci    The  automaton  will  treat  upper  and  lower  case  characters
              identically.   This  is  accomplished  in  the  automaton;   the
              characters in the lexical buffer are unmodified.

       -cs    Upper  and  lower case characters are treated as distinct.  This
              is the default.

       -o dir Directory where output files should go (default=".").   This  is
              very  nice  for  keeping the source directory clear of ANTLR and
              DLG spawn.

              Warns if more than one regular expression could match  the  same
              character  sequence.   The  warnings  give  the  numbers  of the
              expressions  in  the  dlg  lexical  specification   file.    The
              numbering  of  the expressions starts at one.  Multiple warnings
              may be print for the same expressions.

       -      Used in place of file names to get input  from  standard  in  or
              send output to standard out.


       Dlg  works...   we  think.  There is no implicit guarantee of anything.
       We reserve no legal rights to the software known as the Purdue Compiler
       Construction  Tool  Set  (PCCTS)  —  PCCTS is in the public domain.  An
       individual or company may  do  whatever  they  wish  with  source  code
       distributed  with  PCCTS  or the code generated by PCCTS, including the
       incorporation of PCCTS, or its output, into  commercial  software.   We
       encourage  users  to  develop  software with PCCTS.  However, we do ask
       that credit is given to us for developing PCCTS.  By "credit", we  mean
       that  if  you  incorporate  our  source  code into one of your programs
       (commercial  product,  research  project,  or   otherwise)   that   you
       acknowledge  this fact somewhere in the documentation, research report,
       etc...  If you like PCCTS and have  developed  a  nice  tool  with  the
       output,  please  mention that you developed it using PCCTS.  As long as
       these guidelines are followed, we expect  to  continue  enhancing  this
       system  and expect to make other tools available as they are completed.


       mode.h , dlgauto.h , dlgdef.h


       antlr(1), pccts(1)